Assessment of spatial variations of Nitrogen Dioxide, Black Carbon and Particle number, prior to traffic interventions in Glasgow

Stephanie Burns

Abstract


Local authority air quality assessments do not give a complete indication of air pollution in the area because of a limited number of monitoring locations and equipment. The west end of Glasgow does not comply with air quality objectives for NO₂ levels and was declared an Air Quality Management Area. Efficient monitoring approaches can provide improved knowledge in such areas.
This study examines correlations between pollutants measured using spatial and mobile monitoring methods in an area of Glasgow with planned traffic control interventions to mitigate traffic related air pollution. Black Carbon (BC) aethalometers and Particle Number (PN) real-time monitors were used to make short term observations at 18 diffusion tubes sites on a weekly basis for five weeks during Oct/Nov.
High correlations were observed between NO₂ and BC (r=0.74), and between BC and PN (r=0.69). Lower correlation was observed between NO₂ and PN, (r=0.34). Higher concentrations of pollutants were observed close to busy roads; and lower concentrations were observed in visibly quieter residential streets; thus giving good indication of high traffic areas and a study into the area prior to traffic interventions.


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